mitsubishi Workshop Repair Guides

Mitsubishi Workshop Service and Repair Manuals

Component Tests and General Diagnostics|Page 3142 > < Component Tests and General Diagnostics|Page 3140
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<Fuel control condition> 

Using Oscilloscope 

(1) Run the engine at idle speed.
(2) Connect the probe to the oscilloscope pick-up point as shown in the circuit diagram and check the waveform at the drive side of each injector.

HARNESS INSPECTION 

Measure the power supply voltage of the front bank injector.
-

Connector: Disconnected

-

Ignition switch: ON
Voltage (V): Battery positive voltage
OK: GO TO STEP 2
NG: Repair the harness. (A B C1 - MFI relay)

Measure the power supply voltage of the rear bank injector.
-

Connector: Disconnected

-

Ignition switch: ON
Voltage (V): Battery positive voltage
OK: GO TO STEP 3
NG: Repair the harness. (D1 - MFI relay)

Check for an open-circuit, or a short-circuit between the front bank injector and the engine control module.
-

Injector connector: Disconnected

Component Tests and General Diagnostics|Page 3142 > < Component Tests and General Diagnostics|Page 3140